The Roxborough area is home to a large colony of American toads (Bufo americanus). Each spring, between mid-March and late-April, these toads migrate from the woodlands at the Schuylkill Center for Environmental Education (SCEE) to breed in the Roxborough Reservoir across Hagy's Mill and Port Royal Roads. As a result of this breeding, thousands of baby toads (called toadlets) emerge between May 15 and June 20 to leave the reservoir and cross the roads to the woodlands. A group of volunteers work during that period to attempt to assure that the tiny toadlets will survive to return to the reservoir next year to continue the cycle of life.